Siemens SITRANS L Operating Instructions Manual page 63

Parameter
type
Independent
parameters
The recommended values for the propagation factor and for CLEF range are dependent on the
a)
stillpipe diameter. See Propagation Factor/Stillpipe Diameter for values.
① sensor reference point
② air gap
A
Propagation Factor/Stillpipe Diameter
Values
Nominal Pipe Size
Propagation Factor
CLEF Range (2.5.7.4.) settings
Since pipe dimensions may vary slightly, the propagation factor may also vary.
a)
CLEF range covers the whole measurement range except first 700 or 1000 mm from sensor refer-
b)
ence point
SITRANS LR250 with FOUNDATION FIELDBUS
Operating Instructions, 09/2021, A5E32221411-AH
Parameter No./Name
Response Rate
Units
Operating mode
Low Calibration Point
High Calibration Point
Wizard Complete
Propagation Factor (2.5.3.)
Position Detect (2.5.7.2.)
CLEF Range (2.5.7.4.)
700 or 1000 mm (see CLEF Range settings in table below)
a)
Options/Values
MED
M
LEVEL
5
0.5
FINISH
0.988
a)
HYBRID
4.3
a)
③ low calibration point
④ CLEF range 2.5.7.4.
Range 0.3 to 1.0 depending on pipe size
Default 1.0000
40 mm (1.5") 50 mm (2")
0.9844 0.988
Low calibra- Low calibra-
tion point - tion point -
700 mm (2.29 700 mm (2.29
ft) ft)
b) b)
Commissioning
6.3 Application examples
Function
Medium =1 m/minute
meters
Level is reported as Volume
when a vessel shape is
selected.
5 m (16.4 ft)
0.5 m (1.64 ft)
Transfers Quick Start set-
tings to device.
P.F. for a 50 mm (1.96") I.D.
stillpipe
Low calibration point -
0.7 m = 4.3 m (14.1 ft)
80 mm (3") 100 mm (4")
0.9935 0.9965
Low calibra- Low calibra-
tion point - tion point -
1000 mm 1000 mm
(3.28 ft) (3.28 ft)
b) b)
63